XC40 Electric Blower Motor AUC Sensor Fault

I had something similar happen on a 2018 BMW 3 series. The climate control went haywire. It's worth checking the basics, but it could be the sensor itself.

The sensor itself? You mean a replacement? Were the symptoms the same?

Yes, the module was faulty. The symptoms matched, even though it was a different car. It might save you time if you take it in.

The cable was defective, and the plug was loose. Fixed it for 95€.